JP5853562B2 - Manufacturing method of hub unit with encoder and combination seal ring - Google Patents

Manufacturing method of hub unit with encoder and combination seal ring Download PDF

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Publication number
JP5853562B2
JP5853562B2 JP2011220868A JP2011220868A JP5853562B2 JP 5853562 B2 JP5853562 B2 JP 5853562B2 JP 2011220868 A JP2011220868 A JP 2011220868A JP 2011220868 A JP2011220868 A JP 2011220868A JP 5853562 B2 JP5853562 B2 JP 5853562B2
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encoder
seal ring
slinger
ring
raceway
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JP2013079900A (en
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達男 若林
達男 若林
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NSK Ltd
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NSK Ltd
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Priority to CN 201220336843 priority patent/CN202896176U/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/768—Sealings of ball or roller bearings between relatively stationary parts, i.e. static seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F16C33/7883—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Description

この発明は、自動車の車輪を懸架装置に対して回転自在に支持する為のハブユニットのうち、回転側軌道輪と静止側軌道輪との互いに対向する周面同士の間に存在して複数個の転動体を設置した環状空間の端部開口を、スリンガとシールリングとから成る組み合わせシールリングにより塞ぐと共に、このうちのスリンガの軸方向内側面にエンコーダを添着固定して成る、エンコーダ及び組み合わせシールリング付ハブユニットの製造方法の改良に関する。具体的には、前記回転側軌道輪と前記スリンガとの嵌合面のシール性を、長期間に亙って良好に維持できる構造の実現を図るものである。 The present invention provides a hub unit for rotatably supporting a vehicle wheel with respect to a suspension device, and a plurality of hub units exist between mutually opposing peripheral surfaces of a rotation side raceway and a stationary side raceway. The end opening of the annular space in which the rolling elements are installed is closed with a combination seal ring composed of a slinger and a seal ring, and an encoder is attached and fixed to the inner side surface of the slinger in the axial direction. The present invention relates to an improvement in a method for manufacturing a hub unit with a ring. Specifically, it is intended to realize a structure in which the sealing property of the fitting surface between the rotating raceway and the slinger can be satisfactorily maintained over a long period of time.

自動車の車輪を懸架装置に対して回転自在に支持する為に、図５に示す様なハブユニット１が、特許文献１、２に記載される等により、従来から広く知られている。このハブユニット１は、静止側軌道輪である外輪２と回転側軌道輪であるハブ３とを互いに同心に配置している。そして、この外輪２の内周面に設けた、それぞれが静止側軌道である複列の外輪軌道４、４と、前記ハブ３の外周面に設けた、それぞれが回転側軌道である複列の内輪軌道５、５との間に、それぞれが転動体である玉６、６を、両列毎に複数個ずつ配置している。これら各玉６、６は、それぞれ保持器７、７により、転動自在に保持している。この様な構成により、懸架装置に支持固定される前記外輪２の内径側に前記ハブ３を、回転自在に支持している。    In order to rotatably support the wheel of an automobile with respect to a suspension device, a hub unit 1 as shown in FIG. In the hub unit 1, an outer ring 2 that is a stationary side race ring and a hub 3 that is a rotation side race ring are arranged concentrically with each other. And the double row outer ring raceways 4 and 4 each provided on the inner peripheral surface of the outer ring 2 are stationary side raceways, and the double row each provided on the outer peripheral surface of the hub 3 and each is a rotary side raceway. Between the inner ring raceways 5 and 5, a plurality of balls 6 and 6 each of which is a rolling element are arranged in each row. These balls 6 and 6 are held by the cages 7 and 7 so as to be freely rollable. With such a configuration, the hub 3 is rotatably supported on the inner diameter side of the outer ring 2 supported and fixed to a suspension device.

前記外輪２の内周面と前記ハブ３の外周面との間で前記各玉６、６を設置した環状空間８の両端開口は、それぞれシールリング９と組み合わせシールリング１０とにより、全周に亙り塞いでいる。このうちのシールリング９は、金属板製の芯金１１と弾性材製の複数本のシールリップ１２とを備える。そして、このうちの芯金１１を前記外輪２の一端部に締り嵌めで内嵌した状態で、前記各シールリップ１２の先端縁を前記ハブ３の中間部外周面に、全周に亙り摺接させている。   Openings at both ends of the annular space 8 in which the balls 6, 6 are installed between the inner peripheral surface of the outer ring 2 and the outer peripheral surface of the hub 3 are formed around the entire periphery by a seal ring 9 and a combination seal ring 10, respectively. It is crawling up. Among these, the seal ring 9 includes a metal core 11 made of a metal plate and a plurality of seal lips 12 made of an elastic material. Then, with the core metal 11 being fitted into one end portion of the outer ring 2 by an interference fit, the tip edge of each seal lip 12 is slidably contacted with the outer peripheral surface of the intermediate portion of the hub 3 over the entire circumference. I am letting.

又、前記組み合わせシールリング１０は、スリンガ１３と第一シールリング１４とから成る。このうちのスリンガ１３は、金属板を曲げ成形する事により断面Ｌ字形で全体を円環状に構成したもので、円筒部１５と、この円筒部１５の軸方向端縁から径方向外方に折れ曲がった円輪部１６と、これら円筒部１５と円輪部１６との連続部に存在する、断面円弧形の曲面部１７とから成る。この様なスリンガ１３は、前記円筒部１５を前記ハブ３（ハブ本体と共にこのハブ３を構成する内輪）の端部外周面に締り嵌めで外嵌する事により、このハブ３に対し固定している。又、前記第一シールリング１４は、金属板製の芯金１８と弾性材製の複数本のシールリップ１９とを備える。そして、このうちの芯金１８を前記外輪２の他端部に締り嵌めで内嵌した状態で、前記各シールリップ１９の先端縁を前記スリンガ１３の表面に、全周に亙り摺接させている。 The combination seal ring 10 includes a slinger 13 and a first seal ring 14. Of these, the slinger 13 is formed by bending a metal plate to form an entire ring shape with an L-shaped cross section. The slinger 13 is bent radially outward from the cylindrical portion 15 and the axial edge of the cylindrical portion 15. And an annular section 16 and a curved surface section 17 having an arcuate cross section existing in a continuous portion of the cylindrical section 15 and the annular section 16. Such a slinger 13 is fixed to the hub 3 by fitting the cylindrical portion 15 to the outer peripheral surface of the end portion of the hub 3 (the inner ring constituting the hub 3 together with the hub body) by an interference fit. Yes. The first seal ring 14 includes a metal core 18 made of a metal plate and a plurality of seal lips 19 made of an elastic material. Then, with the metal core 18 being fitted into the other end of the outer ring 2 by an interference fit, the tip edge of each seal lip 19 is brought into sliding contact with the surface of the slinger 13 over the entire circumference. Yes.

更に、前記ハブ３に結合固定した車輪の回転速度を測定可能とすべく、上述の様な組み合わせシールリング１０を構成するスリンガ１３の円輪部１６の軸方向内側面（軸方向に関して内とは、自動車への組み付け状態で車体の幅方向中央側で、各図の右側を言う。これに対して、各図の左側である、幅方向端部側を、軸方向に関して外と言う。本明細書及び特許請求の範囲全体で同じ。）に、図６に示す様に、円輪状のエンコーダ２０を、全周に亙り添着固定している。このエンコーダ２０は、ゴム磁石、プラスチック磁石等の永久磁石製で、軸方向に着磁している。着磁方向は、円周方向に関して、交互に、且つ、等間隔で変化させている。従って、被検出面である、前記エンコーダ２０の軸方向内側面には、Ｓ極とＮ極とが、円周方向に関して、交互に、且つ、等間隔で配置されている。この様なエンコーダ２０の被検出面には、センサの検出部を対向させて、前記ハブ３と共に回転する車輪の回転速度を測定自在とする。そして、測定した、車輪の回転速度を表す信号を、アンチロックブレーキシステム（ＡＢＳ）やトラクションコントロールシステム（ＴＣＳ）等、車両の走行安定化装置の制御に利用する。尚、前記エンコーダ２０を装着する為の前記スリンガ１３を、磁性金属製とする事により、このスリンガ１３にバックヨークとしての機能を持たせ、エンコーダ２０の被検出面から出入りする磁束の強度（密度）を確保している。   Further, in order to be able to measure the rotational speed of the wheel coupled and fixed to the hub 3, the inner side surface in the axial direction of the annular portion 16 of the slinger 13 constituting the combination seal ring 10 as described above The right side of each figure is said to be the center side in the width direction of the vehicle body in the state where it is assembled to an automobile, while the end in the width direction, which is the left side of each figure, is said to be outside in the axial direction. The same applies to the entire document and claims.) As shown in FIG. 6, an annular encoder 20 is fixedly attached to the entire circumference. The encoder 20 is made of a permanent magnet such as a rubber magnet or a plastic magnet, and is magnetized in the axial direction. The magnetization direction is changed alternately and at equal intervals in the circumferential direction. Therefore, the south pole and the north pole are alternately arranged at equal intervals in the circumferential direction on the inner side surface in the axial direction of the encoder 20, which is the detected surface. The detection surface of the sensor is opposed to the detection surface of such an encoder 20 so that the rotational speed of the wheel rotating together with the hub 3 can be measured. Then, the measured signal representing the rotational speed of the wheel is used to control a vehicle travel stabilization device such as an anti-lock brake system (ABS) or a traction control system (TCS). The slinger 13 for mounting the encoder 20 is made of a magnetic metal so that the slinger 13 has a function as a back yoke, and the strength (density) of the magnetic flux entering and exiting from the detection surface of the encoder 20. ) Is secured.

ところで、単に前記組み合わせシールリング１０を構成する前記スリンガ１３の円筒部１５を前記ハブ３の端部に外嵌固定しただけでは、この円筒部１５の内周面とこのハブ３の端部外周面との嵌合面のシール性を必ずしも十分に確保できない。即ち、前記スリンガ１３の円筒部１５を前記ハブ３の端部に締り嵌めで外嵌した状態でも、この嵌合部に微小隙間が存在する事は避けられず、この微小隙間に侵入した水分により、前記両周面のうちの少なくとも一方の周面が腐食する事により当該部分の体積が増加すると、この微小隙間が拡がり、この拡がった隙間を通じて、前記環状空間８内に水分が侵入する可能性がある。この環状空間８内への水分の侵入は、グリースの劣化によるハブユニットの耐久性低下の原因となる為、好ましくない。   By the way, the inner peripheral surface of the cylindrical portion 15 and the outer peripheral surface of the end portion of the hub 3 are simply fixed by fitting the cylindrical portion 15 of the slinger 13 constituting the combined seal ring 10 to the end portion of the hub 3. It is not always possible to ensure a sufficient sealing property of the mating surface. That is, even when the cylindrical portion 15 of the slinger 13 is externally fitted to the end portion of the hub 3, it is inevitable that a minute gap exists in the fitting portion, and moisture that has entered the minute gap is unavoidable. When the volume of the part increases due to corrosion of at least one of the two peripheral surfaces, the minute gap expands, and moisture may enter the annular space 8 through the expanded clearance. There is. The intrusion of moisture into the annular space 8 is not preferable because it causes a decrease in durability of the hub unit due to deterioration of grease.

この様な原因でのハブユニット１の耐久性低下を防止する為の構造として、特許文献２に記載された構造が知られている。この改良された従来構造の場合には、図７〜８に示す様に、スリンガ１３ａの曲面部１７ａの内周面、及び、このスリンガ１３ａの円輪部１６ａの軸方向内側面に添着固定したエンコーダ２０ａの内周縁と、ハブ本体の軸方向内端部に外嵌固定されてこのハブ本体と共にハブを構成する内輪２１の外周面との間に存在する隙間２２に、油面接着性を有する接着剤２３を、全周に亙って充填している。この様な改良された構造によれば、前記スリンガ１３ａを構成する円筒部１５ａと前記内輪２１との嵌合部のシール性確保を、長期間に亙り十分に図れる。   As a structure for preventing a decrease in durability of the hub unit 1 due to such a cause, a structure described in Patent Document 2 is known. In the case of this improved conventional structure, as shown in FIGS. 7 to 8, it is attached and fixed to the inner peripheral surface of the curved surface portion 17a of the slinger 13a and the inner surface in the axial direction of the ring portion 16a of the slinger 13a. The gap 22 existing between the inner peripheral edge of the encoder 20a and the outer peripheral surface of the inner ring 21 that is externally fitted and fixed to the inner end of the hub body in the axial direction and forms the hub together with the hub body has oil surface adhesion. The adhesive 23 is filled over the entire circumference. According to such an improved structure, the sealing performance of the fitting portion between the cylindrical portion 15a constituting the slinger 13a and the inner ring 21 can be sufficiently ensured over a long period of time.

但し、上述した改良された構造の場合には、製造工程中で、前記接着剤２３が前記隙間２２からはみ出さない様に、十分に注意する必要がある。この理由は、はみ出した接着剤が軌道面やエンコーダ２０ａの表面に付着して固化すると、ハブユニット１の運転時に有害な振動が発生したり、或いは前記エンコーダ２０ａを利用した回転速度検出を精度良く行えなくなる可能性がある為である。   However, in the case of the improved structure described above, sufficient care must be taken so that the adhesive 23 does not protrude from the gap 22 during the manufacturing process. This is because if the protruding adhesive adheres to the raceway surface or the surface of the encoder 20a and solidifies, harmful vibrations occur during the operation of the hub unit 1, or the rotational speed detection using the encoder 20a is accurately performed. This is because there is a possibility that it will not be possible.

特許文献３には、弾性材製のエンコーダの内周縁に形成したシールリップを、ハブに隣接した等速ジョイントの外周面に当接させる事で、当該部分のシール性確保を図る構造が記載されている。但し、この様な構造は、ハブに隣接して等速ジョイントが存在する必要がある。又、多量の磁性粉末を混入した弾性材製のシールリップは、必ずしも十分なシール性を確保できない可能性がある。
又、特許文献４には、スリンガを構成する円筒部の内周面に形成した係止溝にシールリングを係止して、この円筒部の内周面とハブの外周面との嵌合部のシール性確保を図る構造が記載されている。但し、スリンガを構成する金属板の厚さ寸法は極く小さい為、このスリンガの強度を確保しつつ、必要なシール性を確保する事は非常に困難である。 Patent Document 3 describes a structure in which a seal lip formed on the inner peripheral edge of an encoder made of an elastic material is brought into contact with the outer peripheral surface of a constant velocity joint adjacent to a hub to ensure the sealing performance of the portion. ing. However, such a structure requires a constant velocity joint to be adjacent to the hub. In addition, a sealing lip made of an elastic material mixed with a large amount of magnetic powder may not always ensure a sufficient sealing performance.
In Patent Document 4, a seal ring is locked in a locking groove formed on an inner peripheral surface of a cylindrical portion constituting a slinger, and a fitting portion between the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the hub. The structure which secures the sealing performance of is described. However, since the thickness dimension of the metal plate which comprises a slinger is very small, it is very difficult to ensure a required sealing performance while ensuring the strength of this slinger.

特開２００８−２３３１１０号公報JP 2008-233110 A 特開２００９−１８５９６５号公報JP 2009-185965 A 特開２００７−１８７３１８号公報JP 2007-187318 A 特開２００８−３０３９０７号公報JP 2008-303907 A

本発明は、上述の様な事情に鑑み、実用的構造で、製造時に接着剤のはみ出し等に基づく不具合が発生し難く、しかも、スリンガを構成する円筒部と回転側軌道輪の周面との嵌合部のシール性確保を、長期間に亙り十分に図れる構造を実現できる製造方法を実現すべく発明したものである。 In view of the circumstances as described above, the present invention has a practical structure, is less prone to problems due to the sticking out of an adhesive at the time of manufacture, and the cylindrical portion constituting the slinger and the circumferential surface of the rotating raceway The invention was invented to realize a manufacturing method capable of realizing a structure capable of sufficiently ensuring the sealing performance of the fitting portion over a long period of time.

本発明の製造方法の対象となるエンコーダ及び組み合わせシールリング付ハブユニットは、先に図５〜６により説明した従来構造と同様に、回転側軌道輪及び静止側軌道輪と、複数個の転動体と、組み合わせシールリングと、エンコーダとを備える。
このうちの回転側軌道輪及び静止側軌道輪は、互いに同心に配置されている。
又、前記各転動体は、これら回転側軌道輪及び静止側軌道輪の互いに対向する周面にそれぞれ設けられた回転側軌道と静止側軌道との間に、転動自在に設けられている。
又、前記組み合わせシールリングは、前記回転側軌道輪と前記静止側軌道輪との互いに対向する周面同士の間に存在する環状空間の端部開口を塞ぐ為のもので、スリンガと第一シールリングとから成る。このうちのスリンガは、前記回転側軌道輪の周面の一部で前記静止側軌道輪の周面に対向する部分に嵌合固定されたもので、磁性金属板を曲げ成形する事により断面Ｌ字形で全体を円環状に構成し、円筒部と、この円筒部の軸方向端縁から前記静止側軌道輪に向けて径方向に折れ曲がった円輪部と、これら円筒部と円輪部との連続部に存在する断面円弧形の曲面部とから成る。一方、前記第一シールリングは、前記静止側軌道輪の一部で前記スリンガに対向する部分に嵌合固定されたもので、この静止側軌道輪に嵌合固定される芯金と、この芯金にそれぞれの基端部を支持された複数本のシールリップとを備える。そして、これら各シールリップの先端部を、前記スリンガの表面に全周に亙り摺接させている。
又、前記エンコーダは、熱可塑性を有する合成樹脂中に強磁性粉末を混入させて成るプラスチック磁石製で、全体を円輪状に造られて、前記スリンガを構成する円輪部の軸方向内側面に、このスリンガと同心に添着固定されており、軸方向内側面の磁気特性を円周方向に関して交互に変化させている。 As with the conventional structure described above with reference to FIGS. 5 to 6, the encoder and the hub unit with the combination seal ring, which are the object of the manufacturing method of the present invention, are a rotating side race ring, a stationary side race ring, and a plurality of rolling elements. And a combination seal ring and an encoder.
Of these, the rotation-side raceway and the stationary-side raceway are arranged concentrically with each other.
Each of the rolling elements is rotatably provided between a rotation-side track and a stationary-side track provided on the circumferential surfaces of the rotation-side raceway and the stationary-side raceway facing each other.
Moreover, the combination seal ring is intended for closing an end opening of the annular space existing between the adjacent peripheral surfaces facing each other with the rotating bearing ring and the stationary side raceway ring, slinger the first seal It consists of a ring. Of these, the slinger is fitted and fixed to a part of the peripheral surface of the rotating raceway facing the peripheral surface of the stationary raceway, and the cross section L is obtained by bending a magnetic metal plate. An overall shape is formed in an annular shape, and a cylindrical portion, an annular portion bent radially from the axial end edge of the cylindrical portion toward the stationary raceway, and the cylindrical portion and the annular portion It consists of a curved surface portion having a circular arc cross section existing in the continuous portion. On the other hand, the first seal ring is a part of the stationary side race ring which is fitted and fixed to a portion facing the slinger, and the core metal fitted and fixed to the stationary side race ring, and the core And a plurality of seal lips each having a base end supported by gold. And the front-end | tip part of each of these seal lips is slidably contacted with the surface of the said slinger over the perimeter.
The encoder is made of a plastic magnet in which ferromagnetic powder is mixed in a synthetic resin having thermoplasticity, and the entire encoder is formed in a ring shape on the inner surface in the axial direction of the ring portion constituting the slinger. The magnetic properties of the inner side surface in the axial direction are alternately changed with respect to the circumferential direction.

特に、本発明の製造方法の対象となるエンコーダ及び組み合わせシールリング付ハブユニットの場合には、前記エンコーダの周縁部に係止された弾性材製で円環状の第二シールリングにより、前記スリンガの曲面部と前記回転側軌道輪の周面との間に存在する隙間の開口部を、全周に亙り塞いでいる。 Particularly, in the case of the encoder and with the combination seal ring hub unit to be the production method of the present invention, the second seal ring annularly engaged the elastic material on the periphery of the encoder, of the slinger An opening portion of a gap existing between the curved surface portion and the circumferential surface of the rotating side raceway is closed over the entire circumference.

この様な構成を有するエンコーダ及び組み合わせシールリング付ハブユニットを製造する為に、本発明の場合には、前記エンコーダの周縁部に前記第二シールリングを配置した後、このエンコーダを構成する合成樹脂を溶融変形させて抑え部を形成する事で、該抑え部により前記第二シールリングを前記エンコーダの周縁部に係止する。 In order to manufacture an encoder having such a configuration and a hub unit with a combined seal ring, in the case of the present invention, after the second seal ring is disposed on the peripheral edge of the encoder, the synthetic resin constituting the encoder the melted deformed by forming a depression example section, locking the second seal ring on the periphery of the encoder by該抑example section.

又、本発明を実施する場合に、より具体的には、請求項２に記載した発明の様に、前記エンコーダの周縁の一部に、軸方向内側に向いた段差面を形成する。
そして、このエンコーダの周縁の残部でこの段差面よりも軸方向内側寄り部分を径方向に溶融変形させて前記抑え部を形成する事で、該抑え部と前記段差面との間で前記第二シールリングの径方向片半部を挟持する。そして、この第二シールリングを前記エンコーダの周縁部に係止する。これにより、エンコーダ及び組み合わせシールリング付ハブユニットの組立状態で、この第二シールリングの径方向他端側の周縁を前記回転側軌道輪の周面に、全周に亙って弾性的に当接させる。 When the present invention is implemented, more specifically, a stepped surface facing inward in the axial direction is formed on a part of the peripheral edge of the encoder as in the invention described in claim 2 .
Then, by forming the pressing section is melted deforming the axially inboard portion in a radial direction from the stepped surface in the remainder of the periphery of the encoder, the second between the該抑example section the stepped surface The radial half of the seal ring is clamped. And this 2nd seal ring is latched to the peripheral part of the said encoder . As a result , in the assembled state of the encoder and the hub unit with the combined seal ring, the peripheral edge on the other end side in the radial direction of the second seal ring is elastically applied to the circumferential surface of the rotating raceway over the entire circumference. Make contact.

或いは、請求項３に記載した発明の様に、前記エンコーダの軸方向内側面の一部で、径方向に関してスリンガの円筒部を設置した端部寄り部分に、径方向に向いた段差面を形成する。
そして、前記エンコーダの軸方向内側面の残部でこの段差面よりも径方向に関して端縁寄りの部分を径方向に溶融変形させて前記抑え部を形成する事で、該抑え部と前記段差面との間で前記第二シールリングの軸方向外半部を挟持する。そして、この第二シールリングを前記エンコーダの周縁部に係止する。これにより、エンコーダ及び組み合わせシールリング付ハブユニットの組立状態で、この第二シールリングの軸方向内端側の周縁を前記回転側軌道輪の周面に、全周に亙って弾性的に当接させる。 Alternatively, as in the invention described in claim 3 , a step surface facing in the radial direction is formed on a part of the inner side surface in the axial direction of the encoder near the end where the cylindrical portion of the slinger is installed in the radial direction. To do.
Then, by forming the axially inner balance by the restraining portion is melted deform the portion of the end edge closer to the radial direction with respect to the radial direction than the stepped surface of the side surface of the encoder, a該抑example portion and the stepped surface The outer half of the second seal ring in the axial direction is sandwiched between the two . And this 2nd seal ring is latched to the peripheral part of the said encoder . Thus , in the assembled state of the encoder and the hub unit with the combined seal ring, the peripheral edge on the inner end side in the axial direction of the second seal ring is elastically applied to the circumferential surface of the rotating raceway over the entire circumference. Make contact.

或いは、請求項４に記載した発明の様に、前記エンコーダの周縁の一部に、軸方向内側に向いた段差面を形成すると共に、該段差面の円周方向複数箇所から軸方向内方に突出する状態で複数本の係止ピン部を形成する。
そして、前記第二シールリング及びこの第二シールリングの軸方向内側面側に重ね合わされた円環状の抑え板の互いに整合する部分に形成した通孔に、前記各係止ピンを挿通する。その後、これら各係止ピン部の先端部でこの抑え板の軸方向内側面から突出した部分を加熱して外径が大きくなる方向に溶融変形させる事で、該突出した部分に前記抑え部を形成する。そして、該抑え部により、前記抑え板が前記段差面から離れる方向に変位するのを阻止する。そして、これら抑え板と段差面との間で前記第二シールリングの径方向片半部を挟持する事により、この第二シールリングを前記エンコーダの周縁部に係止する。これにより、エンコーダ及び組み合わせシールリング付ハブユニットの組立状態で、この第二シールリングの径方向他端側の周縁を前記回転側軌道輪の周面に、全周に亙って弾性的に当接させる。 Alternatively, as in the invention described in claim 4 , a step surface facing inward in the axial direction is formed on a part of the peripheral edge of the encoder, and inward in the axial direction from a plurality of circumferential positions on the step surface. forming a locking pin of the several double in a state of projecting.
Then, the respective locking pins are inserted into through holes formed in the second seal ring and the annular holding plates overlapped with each other on the inner side in the axial direction of the second seal ring. Then, by the outside diameter by heating the portion protruding from the axially inner side surface of the restraining plate at the tip portion of the engaging pin portion Ru melted deformed in the direction of increasing, the pressing section to the portion out projecting Form. Then, by the pressing section, the holding plate is prevented from displacement in a direction away from the stepped surface. Then, the second seal ring is locked to the peripheral edge portion of the encoder by sandwiching a radial half portion of the second seal ring between the holding plate and the stepped surface . As a result , in the assembled state of the encoder and the hub unit with the combined seal ring, the peripheral edge on the other end side in the radial direction of the second seal ring is elastically applied to the circumferential surface of the rotating raceway over the entire circumference. Make contact.

上述の様に構成する本発明のエンコーダ及び組み合わせシールリング付ハブユニットの製造方法によれば、製造時に接着剤のはみ出し等に基づく不具合が発生し難く、しかも、スリンガを構成する円筒部と回転側軌道輪の周面との嵌合部のシール性確保を、長期間に亙り十分に図れる、実用的な構造を実現できる。 According to the manufacturing method of the encoder unit and the hub unit with the combined seal ring of the present invention configured as described above, problems due to the sticking out of the adhesive or the like hardly occur at the time of manufacturing, and the cylindrical portion constituting the slinger and the rotating side It is possible to realize a practical structure that can sufficiently ensure the sealing performance of the fitting portion with the peripheral surface of the raceway for a long period of time.

本発明の実施の形態の第１例を示す、エンコーダを組み付けた組み合わせシールリングの部分拡大断面図。The partial expanded sectional view of the combination seal ring which attached the encoder which shows the 1st example of embodiment of this invention. 同第２〜４例を示す、図１の右下部に相当する図。The figure equivalent to the lower right part of FIG. 1 which shows the 2nd-4th example. 同第５例を示す、図１の右下部に相当する図。The figure equivalent to the lower right part of FIG. 1 which shows the 5th example. 同第６例を示す、図１の右下部に相当する図。The figure equivalent to the lower right part of FIG. 1 which shows the 6th example. 従来から知られているエンコーダ及び組み合わせシールリング付ハブユニットの１例を示す断面図。Sectional drawing which shows an example of the hub unit with a conventionally known encoder and a combination seal ring. 図５のＸ部拡大図。The X section enlarged view of FIG. シール性を向上させた、従来構造の第２例を示す部分断面図。The fragmentary sectional view which shows the 2nd example of the conventional structure which improved the sealing performance. 図７のＹ部拡大図。The Y section enlarged view of FIG.

［実施の形態の第１例］
図１は、請求項１〜２に対応する、本発明の実施の形態の第１例を示している。尚、本例の特徴は、組み合わせシールリング１０ａを構成するスリンガ１３ａの円輪部１６ａの軸方向内側面に添着固定したエンコーダ２０ｂの内周縁に第二シールリング２４を係止し、この第二シールリング２４により、このエンコーダ２０ｂの内周縁と、ハブを構成する内輪２１の外周面との間の隙間を塞ぐ点、及び、その為に前記第二シールリング２４を係止する方法にある。その他の部分の構成及び作用は、基本的には、前述の図５〜８に示した従来構造と同様であるから、重複する図示並びに説明を、省略若しくは簡略にし、以下、本例の特徴部分、並びに、先に説明しなかった部分を中心に説明する。 [First example of embodiment]
FIG. 1 shows a first example of an embodiment of the present invention corresponding to claims 1 and 2 . The feature of this example is that the second seal ring 24 is locked to the inner peripheral edge of the encoder 20b attached and fixed to the inner surface in the axial direction of the annular portion 16a of the slinger 13a constituting the combination seal ring 10a . The seal ring 24 closes the gap between the inner peripheral edge of the encoder 20b and the outer peripheral surface of the inner ring 21 constituting the hub, and the second seal ring 24 is locked therefor. Since the configuration and operation of the other parts are basically the same as those of the conventional structure shown in FIGS. 5 to 8, the overlapping illustrations and explanations are omitted or simplified. In addition, the description will focus on the parts that have not been described previously.

前記エンコーダ２０ｂは、熱可塑性の合成樹脂中に強磁性粉末を混入させて成るプラスチック磁石製である。又、前記スリンガ１３ａは、磁性金属板である、ＳＵＳ４３０等のフェライト系ステンレス鋼板にプレス加工を施す事により造っている。そして、前記円輪部１６ａと前記エンコーダ２０ｂとを、接着剤により添着固定している。そのままでは、ステンレス鋼板の接着性は良好ではないので、前記円輪部１６ａと前記エンコーダ２０ｂとを接着する為に、特許文献１に記載された様に、この円輪部１６ａに微小な凹凸を形成してこの凹凸に接着剤を入り込ませる事と、この円輪部１６ａに塗布した接着剤が半硬化の状態で前記エンコーダ２０ｂの射出成形を行い、この接着剤を二次加熱して硬化を進める事とにより、このエンコーダ２０ｂと前記円輪部１６ａとの接着強度を高める。この点に就いては、前記特許文献１に記載されており、本発明の要旨でもない為、より詳しい説明は省略する。又、前記エンコーダ２０ｂの組成（磁性粉末の混合割合、合成樹脂の種類）に就いては、特許文献２に記載されている為、詳しい説明は省略する。   The encoder 20b is made of a plastic magnet formed by mixing a ferromagnetic powder in a thermoplastic synthetic resin. The slinger 13a is made by pressing a ferritic stainless steel plate such as SUS430, which is a magnetic metal plate. The annular portion 16a and the encoder 20b are attached and fixed with an adhesive. As it is, the adhesiveness of the stainless steel plate is not good. Therefore, in order to bond the annular portion 16a and the encoder 20b, as described in Patent Document 1, minute irregularities are formed on the annular portion 16a. The adhesive is applied to the concave and convex portions, and the encoder 20b is injection-molded with the adhesive applied to the ring portion 16a being semi-cured, and the adhesive is secondarily heated to be cured. By proceeding, the adhesive strength between the encoder 20b and the annular portion 16a is increased. Since this point is described in Patent Document 1 and is not the gist of the present invention, more detailed explanation is omitted. The composition of the encoder 20b (magnetic powder mixing ratio, type of synthetic resin) is described in Patent Document 2 and will not be described in detail.

本例の場合、前記エンコーダ２０ｂの内周縁部に、Ｏリングの如き、弾性材製で円環状の、前記第二シールリング２４を係止している。この為に本例の場合には、前記エンコーダ２０ｂの内周縁の軸方向中間部に、軸方向内側に向いた段差面２５を形成している。又、このエンコーダ２０ｂの内周縁の残部で、この段差面２５よりも軸方向内側寄り部分に抑え部２６を、全周に亙って、或いは周方向に関して間欠的に形成している。即ち、この抑え部２６は、前記第二シールリング２４を抑え付けられれば良く、必ずしも全周に亙って形成する必要はない。例えば、形成し易さを考慮すれば、円周方向複数箇所にスリットを有する（間欠的に形成した）構造が有利である。 In the case of this example, the second seal ring 24 made of an elastic material, such as an O-ring, is engaged with the inner peripheral edge of the encoder 20b. For this reason, in the case of this example, a step surface 25 directed inward in the axial direction is formed at the axially intermediate portion of the inner peripheral edge of the encoder 20b. In addition, in the remaining portion of the inner peripheral edge of the encoder 20b, a restraining portion 26 is formed over the entire circumference or intermittently in the circumferential direction at a portion closer to the inner side in the axial direction than the step surface 25. That is, it is only necessary that the restraining portion 26 restrains the second seal ring 24, and it is not always necessary to form the restraining portion 26 over the entire circumference. For example, considering the ease of formation, a structure having slits (formed intermittently) at a plurality of locations in the circumferential direction is advantageous.

何れにしても、前記抑え部２６を形成する為、前記エンコーダ２０ｂの射出成形時にこのエンコーダ２０ｂの軸方向内側面の径方向内端部に短円筒状若しくは欠円筒状の突壁２７を、全周に亙って、若しくは周方向に関して間欠的に形成し、この突壁２７を、加熱しつつ径方向内方に溶融変形させる事で、前記抑え部２６とする。そして、この抑え部２６と、前記段差面２５と、前記エンコーダ２０の内周縁とにより三方を囲まれた係止溝２８に、前記第二シールリング２４を係止する。係止作業は、前記突壁２７を前記抑え部２６とするのと同時に行う。この第二シールリング２４の断面の直径は、前記係止溝２８の径方向深さよりも大きいので、この第二シールリング２４の内径側端部は、この係止溝２８の開口部よりも径方向内方に突出した状態となる。尚、図示の例では、前記突壁２７の周囲部分に凹溝２９を全周に亙って形成している。この凹溝２９は、この突壁２７を加熱して前記抑え部２６とする際に使用するウェルダの進入を容易にして、前記エンコーダ２０ｂの被検出面を損傷せずに、前記抑え部２６の加工を行う為に設けている。 In any case, in order to form the restraining portion 26, a short cylindrical or semi-cylindrical protruding wall 27 is formed on the radially inner end of the axial inner side surface of the encoder 20b during the injection molding of the encoder 20b. It is formed intermittently in the circumferential direction or in the circumferential direction, and the protruding wall 27 is melted and deformed inward in the radial direction while being heated, thereby forming the restraining portion 26. Then, the second seal ring 24 is locked in a locking groove 28 surrounded on three sides by the holding portion 26, the stepped surface 25, and the inner peripheral edge of the encoder 20. The locking operation is performed at the same time when the protruding wall 27 is used as the holding portion 26. Since the diameter of the cross section of the second seal ring 24 is larger than the depth in the radial direction of the locking groove 28, the inner diameter side end of the second seal ring 24 has a diameter larger than the opening of the locking groove 28. It becomes a state protruding inward in the direction. In the example shown in the figure, a concave groove 29 is formed around the entire periphery of the protruding wall 27. The concave groove 29 facilitates entry of a welder used when the protruding wall 27 is heated to form the holding portion 26, and the detected surface of the encoder 20 b is not damaged, and the holding portion 26 is not damaged. It is provided for processing.

上述の様に、内周縁部に前記第二シールリング２４を係止したエンコーダ２０ｂを前記円輪部１６ａの軸方向内側面に添着固定したスリンガ１３ａを、ハブを構成する内輪２１に外嵌すると、前記第二シールリング２４が、この内輪２１の外周面と前記係止溝２８の底面との間で弾性的に圧縮される。そして、前記第二シールリング２４により、前記スリンガ１３ａの曲面部１７ａと前記内輪２１の外周面との間に存在する隙間２２の開口部が、全周に亙って塞がれる。この結果、前記スリンガ１３ａを構成する円筒部１５ａと前記内輪２１の外周面との嵌合部のシール性確保を、長期間に亙り十分に図れる。 As described above, when the slinger 13a in which the encoder 20b with the second seal ring 24 locked to the inner peripheral edge is attached and fixed to the inner side surface in the axial direction of the annular ring portion 16a is externally fitted to the inner ring 21 constituting the hub. The second seal ring 24 is elastically compressed between the outer peripheral surface of the inner ring 21 and the bottom surface of the locking groove 28. And the opening part of the clearance gap 22 which exists between the curved surface part 17a of the said slinger 13a and the outer peripheral surface of the said inner ring | wheel 21 is plugged up by the said 2nd seal ring 24 over the perimeter. As a result, the sealing performance of the fitting portion between the cylindrical portion 15a constituting the slinger 13a and the outer peripheral surface of the inner ring 21 can be sufficiently ensured over a long period of time.

［実施の形態の第２〜４例］
図２は、請求項１〜２に対応する、本発明の実施の形態の第２〜４例を示している。これら各例の場合には、エンコーダ２０ｂの内周縁に係止する第二シールリング２４ａ〜２４ｃの形状が、上述した実施の形態の第１例の場合と異なっている。先ず、（Ａ）に示した第２例の場合には、断面形状が半円形で内周面側が凸面となった第二シールリング２４ａを使用している。又、（Ｂ）に示した第３例の場合には、内周縁側が尖った、断面形状が楔形である第二シールリング２４ｂを使用している。更に、（Ｃ）に示した第３例の場合には、断面形状が「く」字形である第二シールリング２４ｃを使用している。第二シールリング２４ａ〜２４ｃの形状が異なる点以外の構成及び作用は、前述した実施の形態の第１例と同様であるから、重複する図示並びに説明は省略する。 [Second to Fourth Examples of Embodiment]
FIG. 2 shows second to fourth examples of an embodiment of the present invention corresponding to claims 1 and 2 . In each of these examples, the shapes of the second seal rings 24a to 24c locked to the inner peripheral edge of the encoder 20b are different from those in the first example of the above-described embodiment. First, in the case of the second example shown in (A), the second seal ring 24a having a semicircular cross-sectional shape and a convex surface on the inner peripheral surface side is used. In the case of the third example shown in (B), the second seal ring 24b having a sharp inner peripheral side and a wedge-shaped cross section is used. Further, in the case of the third example shown in (C), the second seal ring 24 c having a “<” shape in cross section is used. Since the configurations and operations other than the differences in the shapes of the second seal rings 24a to 24c are the same as those in the first example of the embodiment described above, overlapping illustrations and descriptions are omitted.

尚、前記図２の（Ｃ）に示した実施の形態の第４例の第二シールリング２４ｃは、一般的にシールリングとして使用される、ゴムの如きエラストマー製の材料を使用する必要がある。これに対して、図１及び図２の（Ａ）（Ｂ）に示した、実施の形態の第１〜３例の第二シールリング２４、２４ａ、２４ｂは、上述したエラストマー製の材料は勿論、発泡ウレタンの如き、スポンジ状の材料を使用する事もできる。 Incidentally, the second seal ring 24c of the fourth example of the embodiment shown in FIG. 2C needs to use an elastomeric material such as rubber, which is generally used as a seal ring. . On the other hand, the second seal rings 24, 24a and 24b of the first to third examples of the embodiment shown in FIGS. 1 and 2A and 2B are of course the above-described elastomeric materials. Sponge-like materials such as urethane foam can also be used.

［実施の形態の第５例］
図３は、請求項１、３に対応する、本発明の実施の形態の第５例を示している。本例の場合には、エンコーダ２０ｂの軸方向内側面の径方向内端寄り部分に、径方向内方に向いた段差面２５ａを形成している。又、この軸方向内側面の径方向内端部に設けた、円筒状若しくは欠円筒状の突壁２７ａを径方向外方に溶融変形させて、抑え部２６ａを形成している。そして、この抑え部２６ａと前記段差面２５ａとの間で、第二シールリング２４ｄの軸方向外半部を構成する基部３０を挟持している。この第二シールリング２４ｄは、四角形の断面形状を有するこの基部３０と、この基部３０の内周面の軸方向内端部から径方向内方に突出したシールリップ３１とから成る。そして、上述の様にして、前記基部３０を前記エンコーダ２０ｂの内周縁部に支持固定した状態で、前記シールリップ３１の先端縁（内周縁）を、ハブを構成する内輪２１の外周面に、全周に亙って当接させている。尚、本例の場合には、前記突壁２７ａを径方向外方に溶融変形させて、前記抑え部２６ａとするので、この突壁２７ａを全周に連続させた円筒状としても、この抑え部２６ａを精度良く形成できる。又、本例の構造を組み立てる場合、本発明の技術的範囲からは外れるが、前記突壁２７ａを溶融変形させて前記抑え部２６ａとした後、この抑え部２６ａと前記段差面２５ａとの間の係止溝２８ａに、前記基部３０を内嵌する事もできる。第二シールリング２４ｄの形状及びその支持構造が異なる点以外の構成及び作用は、前述した実施の形態の第１例と同様であるから、重複する図示並びに説明は省略する。 [Fifth Example of Embodiment]
FIG. 3 shows a fifth example of the embodiment of the invention corresponding to claims 1 and 3 . In the case of this example, a step surface 25a facing inward in the radial direction is formed at a portion near the radially inner end of the axial inner side surface of the encoder 20b. Further, the cylindrical or partially cylindrical protruding wall 27a provided at the radially inner end of the axially inner side surface is melted and deformed radially outward to form the restraining portion 26a. And the base 30 which comprises the axial direction outer half part of the 2nd seal ring 24d is clamped between this suppressing part 26a and the said level | step difference surface 25a. The second seal ring 24d includes a base 30 having a quadrangular cross-sectional shape, and a seal lip 31 projecting radially inward from the axial inner end of the inner peripheral surface of the base 30. As described above, with the base 30 supported and fixed to the inner peripheral edge of the encoder 20b, the tip edge (inner peripheral edge) of the seal lip 31 is placed on the outer peripheral surface of the inner ring 21 constituting the hub. It is in contact over the entire circumference. In the case of this example, the protruding wall 27a is melted and deformed radially outward to form the holding portion 26a. The portion 26a can be formed with high accuracy. Further, when the structure of this example is assembled, it is out of the technical scope of the present invention, but after the protruding wall 27a is melted and deformed to form the restraining portion 26a, the space between the restraining portion 26a and the stepped surface 25a. The base 30 can be fitted in the locking groove 28a. Since the configuration and operation other than the difference in the shape and support structure of the second seal ring 24d are the same as those in the first example of the above-described embodiment, overlapping illustration and description are omitted.

尚、以上に述べた実施の形態の第１〜５例の場合、前記突壁２７、２７ａを加熱溶融させて前記係止溝２８、２８ａを形成する作業と、前記エンコーダ２０ｂの内径側部分に前記第二シールリング２４、２４ａ、２４ｂ、２４ｃ、２４ｄを設置する作業との前後は問わない。例えば、本発明の技術的範囲からは外れるが、予め突壁２７、２７ａを溶融変形させて前記係止溝２８、２８ａを形成してから、前記第二シールリング２４、２４ａ、２４ｂ、２４ｃ、２４ｄを装着しても良い。或いは、本発明の様に、この第二シールリング２４、２４ａ、２４ｂ、２４ｃ、２４ｄを前記エンコーダ２０ｂの内径側部分に配置してから、前記突壁２７、２７ａを加熱溶融させ、前記係止溝２８、２８ａを形成しても良い。 In the first to fifth examples of the embodiment described above, the projecting walls 27, 27a are heated and melted to form the locking grooves 28, 28a, and the inner diameter side portion of the encoder 20b. It does not matter before and after the operation of installing the second seal rings 24, 24a, 24b, 24c, 24d. For example, although not within the technical scope of the present invention , the second sealing rings 24, 24a, 24b, 24c, You may wear 24d. Alternatively, as in the present invention, the second seal rings 24, 24a, 24b, 24c, and 24d are disposed on the inner diameter side portion of the encoder 20b, and then the protruding walls 27 and 27a are heated and melted, and the locking is performed. The grooves 28 and 28a may be formed.

［実施の形態の第６例］
図４は、請求項１、４に対応する、本発明の実施の形態の第６例を示している。本例の場合には、エンコーダ２０ｂの内周縁部分に、軸方向内側に向いた段差面２５ｂを形成している。そして、この段差面２５ｂの円周方向複数箇所に係止ピン部３２を、軸方向内方に突出する状態で形成している。そして、これら各係止ピン部３２を、第二シールリング２４ｅ及びこの第二シールリング２４ｅの軸方向内側面側に重ね合わされた円環状の抑え板３３の互いに整合する部分に形成した通孔に挿通している。更に、前記各係止ピン部３２の先端部で前記抑え板３３の軸方向内側面から突出した部分を加熱して外径が大きくなる方向に溶融変形させ、鍔状の抑え部２６ｂとしている。そして、この抑え部２６ｂと前記段差面２５ｂとの間で、前記第二シールリング２４ｅと前記抑え板３３とを挟持して、この第二シールリング２４ｅを前記エンコーダ２０ｂの内周縁部に係止している。更に、この第二シールリング２４ｅの内周縁を、ハブを構成する内輪２１の外周面に、全周に亙って当接させている。 [Sixth Example of Embodiment]
FIG. 4 shows a sixth example of an embodiment of the present invention corresponding to claims 1 and 4 . In the case of this example, a step surface 25b facing inward in the axial direction is formed on the inner peripheral edge portion of the encoder 20b. And the latching pin part 32 is formed in the circumferential direction multiple places of this level | step difference surface 25b in the state which protrudes in an axial direction inner side. These locking pin portions 32 are formed in through holes formed in the mutually matching portions of the second seal ring 24e and the annular holding plate 33 superimposed on the inner side surface in the axial direction of the second seal ring 24e. It is inserted. Furthermore, the portion protruding from the inner side surface in the axial direction of the holding plate 33 at the tip of each locking pin portion 32 is heated and melted and deformed in the direction in which the outer diameter increases to form a hook-like holding portion 26b. Then, the pressing section 26b and between the stepped surface 25b, to clamp the holding plate 33 the said second sealing ring 24e, locking the second seal ring 24e to the inner peripheral edge of the encoder 20b doing. Further, the inner peripheral edge of the second seal ring 24e is brought into contact with the outer peripheral surface of the inner ring 21 constituting the hub over the entire periphery.

尚、本例の構造の場合、前記各係止ピン部３２の先端部に形成した前記抑え部２６ｂのみでは、前記抑え板３３を抑え付ける力を十分に大きくできず、前記第二シールリング２４ｅと前記段差面２５ｂとの当接部のシール性を必ずしも十分に確保できない可能性がある。この様な点を考慮して本例の場合には、前記第二シールリング２４ｅの外周縁も、薄肉のリップ形状とし、この外周縁を前記エンコーダ２０ｂの内周縁の一部に全周に亙り当接させて、このエンコーダ２０ｂと前記第二シールリング２４ｅとの間のシール性を確保している。第二シールリング２４ｅの形状及びその支持構造が異なる点以外の構成及び作用は、前述した実施の形態の第１例と同様であるから、重複する図示並びに説明は省略する。 In the case of the structure of this example, the force for holding down the holding plate 33 cannot be sufficiently increased only by the holding portion 26b formed at the tip of each locking pin portion 32, and the second seal ring 24e. There is a possibility that the sealing performance of the contact portion between the stepped surface 25b and the stepped surface 25b cannot be sufficiently ensured. In consideration of such points, in the case of the present example, the outer peripheral edge of the second seal ring 24e is also formed into a thin lip shape, and this outer peripheral edge extends over a part of the inner peripheral edge of the encoder 20b. The sealing property between the encoder 20b and the second seal ring 24e is ensured by contact. Since the configuration and operation other than the difference in the shape of the second seal ring 24e and its support structure are the same as those in the first example of the above-described embodiment, overlapping illustration and description are omitted.

図示の各例は、本発明を内輪回転型のハブユニットに適用した場合に就いて示したが、本発明は、外輪回転型のハブユニットに適用する事もできる。この場合には、各部の構造を、図示の各例の場合とは径方向に関して、内外逆にする。   Each example shown in the figure shows the case where the present invention is applied to an inner ring rotating type hub unit, but the present invention can also be applied to an outer ring rotating type hub unit. In this case, the structure of each part is reversed inside and outside with respect to the radial direction as compared with the examples in the drawings.

１ ハブユニット
２ 外輪
３ ハブ
４ 外輪軌道
５ 内輪軌道
６ 玉
７、７ａ 保持器
８ 環状空間
９ シールリング
１０、１０ａ 組み合わせシールリング
１１ 芯金
１２ シールリップ
１３、１３ａ、１３ｂ スリンガ
１４ 第一シールリング
１５、１５ａ、１５ｂ 円筒部
１６、１６ａ、１６ｂ 円輪部
１７、１７ａ、１７ｂ 曲面部
１８、１８ａ 芯金
１９、１９ａ シールリップ
２０、２０ａ、２０ｂ エンコーダ
２１ 内輪
２２ 隙間
２３ 接着剤
２４、２４ａ、２４ｂ、２４ｃ、２４ｄ、２４ｅ 第二シールリング
２５、２５ａ、２５ｂ 段差面
２６、２６ａ、２６ｂ 抑え部
２７、２７ａ 突壁
２８、２８ａ 係止溝
２９ 凹溝
３０ 基部
３１ シールリップ
３２ 係止ピン部
３３ 抑え板 DESCRIPTION OF SYMBOLS 1 Hub unit 2 Outer ring 3 Hub 4 Outer ring raceway 5 Inner ring raceway 6 Ball 7, 7a Cage 8 Annular space 9 Seal ring 10, 10a Combination seal ring 11 Core metal 12 Seal lip 13, 13a, 13b Slinger
14 First seal ring 15, 15a, 15b Cylindrical portion 16, 16a, 16b Circular ring portion 17, 17a, 17b Curved portion 18, 18a Core metal 19, 19a Seal lip 20, 20a, 20b Encoder 21 Inner ring 22 Gap 23 Adhesive 24, 24a, 24b, 24c, 24d, 24e Second seal ring 25, 25a, 25b Stepped surface 26, 26a, 26b Holding part 27, 27a Projecting wall 28, 28a Locking groove 29 Recessed groove 30 Base 31 Seal lip 32 Engagement Stop pin 33 Holding plate

Claims (4)

互いに同心に配置された回転側軌道輪及び静止側軌道輪と、これら回転側軌道輪及び静止側軌道輪の互いに対向する周面にそれぞれ設けられた回転側軌道と静止側軌道との間に転動自在に設けられた複数個の転動体と、前記回転側軌道輪と前記静止側軌道輪との互いに対向する周面同士の間に存在する環状空間の端部開口を塞ぐ、スリンガと第一シールリングとから成る組み合わせシールリングと、全体を円輪状に造られて軸方向内側面の磁気特性を円周方向に関して交互に変化させたエンコーダとを備え、
このうちのスリンガは、前記回転側軌道輪の周面の一部で前記静止側軌道輪の周面に対向する部分に嵌合固定されたもので、磁性金属板を曲げ成形する事により断面Ｌ字形で全体を円環状に構成し、円筒部と、この円筒部の軸方向端縁から前記静止側軌道輪に向けて径方向に折れ曲がった円輪部と、これら円筒部と円輪部との連続部に存在する断面円弧形の曲面部とから成り、
前記第一シールリングは、前記静止側軌道輪の一部で前記スリンガに対向する部分に嵌合固定されたもので、この静止側軌道輪に嵌合固定される芯金と、この芯金にそれぞれの基端部を支持された複数本のシールリップとを備え、これら各シールリップの先端部を、前記スリンガの表面に全周に亙り摺接させており、
前記エンコーダは、熱可塑性を有する合成樹脂中に強磁性粉末を混入させて成るプラスチック磁石製で、前記スリンガを構成する円輪部の軸方向内側面に、このスリンガと同心に添着固定されており、
前記エンコーダの周縁部に係止された弾性材製で円環状の第二シールリングにより前記スリンガの曲面部と前記回転側軌道輪の周面との間に存在する隙間の開口部を全周に亙り塞いでいる
エンコーダ及び組み合わせシールリング付ハブユニットの製造方法であって、
前記エンコーダの周縁部に前記第二シールリングを配置した後、このエンコーダを構成する合成樹脂を溶融変形させて抑え部を形成する事で、該抑え部により前記第二シールリングを前記エンコーダの周縁部に係止する事を特徴とするエンコーダ及び組み合わせシールリング付ハブユニットの製造方法。 The rotating side raceway and the stationary side raceway arranged concentrically with each other, and the rotation side raceway and the stationary side raceway between the rotation side raceway and the stationary side raceway respectively provided on the mutually opposing circumferential surfaces. A plurality of rolling elements provided in a freely movable manner, and a slinger and a first that close an end opening of an annular space existing between mutually opposing circumferential surfaces of the rotating side raceway and the stationary side raceway A combination seal ring composed of a seal ring, and an encoder that is formed into a ring shape as a whole and alternately changes the magnetic characteristics of the inner surface in the axial direction with respect to the circumferential direction;
Of these, the slinger is fitted and fixed to a part of the peripheral surface of the rotating raceway facing the peripheral surface of the stationary raceway, and the cross section L is obtained by bending a magnetic metal plate. An overall shape is formed in an annular shape, and a cylindrical portion, an annular portion bent radially from the axial end edge of the cylindrical portion toward the stationary raceway, and the cylindrical portion and the annular portion It consists of a curved part with an arc cross section existing in the continuous part,
The first seal ring is a part of the stationary side race that is fitted and fixed to a portion that faces the slinger, and a core metal that is fitted and fixed to the stationary side race ring. A plurality of seal lips supported on the respective base ends, and the tip of each seal lip is in sliding contact with the entire surface of the slinger,
Wherein the encoder is made of a plastic magnet made by mixing the ferromagnetic powder in a synthetic resin having thermoplasticity, the axially inner side of the circular ring portion constituting the slinger are affixed fixed to the slinger concentrically ,
An opening of a gap existing between the curved surface portion of the slinger and the peripheral surface of the rotating raceway is formed on the entire circumference by an annular second seal ring made of an elastic material locked to the peripheral portion of the encoder. A manufacturing method for a closed-enclosed encoder and a hub unit with a combined seal ring,
After the second seal ring is disposed at the peripheral edge of the encoder, the synthetic resin constituting the encoder is melted and deformed to form a suppression portion. manufacturing method of the encoder and with the combination seal ring hub unit, characterized in that locking the parts. 前記エンコーダの周縁の一部に、軸方向内側に向いた段差面が形成されており、
このエンコーダの周縁の残部で前記段差面よりも軸方向内側寄り部分を径方向に溶融変形させて前記抑え部を形成する事で、該抑え部と前記段差面との間で前記第二シールリングの径方向片半部を挟持して、この第二シールリングを前記エンコーダの周縁部に係止する、請求項１に記載したエンコーダ及び組み合わせシールリング付ハブユニットの製造方法。 A stepped surface facing inward in the axial direction is formed on a part of the peripheral edge of the encoder,
By forming the restraining portion is melted deforming the axially inboard portion in the radial direction than the stepped surface in the remainder of the periphery of the encoder, said second sealing ring between the該抑example section the stepped surface by sandwiching the radial piece halves, the second seal ring engaging a peripheral portion of the encoder, the manufacturing method of the encoder and with the combination seal ring hub unit according to claim 1. 前記エンコーダの軸方向内側面の一部で、径方向に関してスリンガの円筒部を設置した端部寄り部分に、径方向に向いた段差面が形成されており、
このエンコーダの軸方向内側面の残部でこの段差面よりも径方向に関して端縁寄りの部分を径方向に溶融変形させて前記抑え部を形成する事で、該抑え部と前記段差面との間で前記第二シールリングの軸方向外半部を挟持して、この第二シールリングを前記エンコーダの周縁部に係止する、請求項１に記載したエンコーダ及び組み合わせシールリング付ハブユニットの製造方法。 In a part of the inner side surface of the encoder in the axial direction, a step surface facing in the radial direction is formed in a portion near the end where the cylindrical portion of the slinger is installed in the radial direction,
By forming the pressing section is melted deform the portion of the end edge closer to the radial direction with respect to the radial direction than the step surface in the remainder of the axially inner side of the encoder, between the該抑example section the stepped surface in sandwiching the axially outer half portion of said second seal ring to lock the second seal ring on the periphery of the encoder, the manufacturing method of the encoder and with the combination seal ring hub unit according to claim 1 . 前記エンコーダの周縁の一部に、軸方向内側に向いた段差面が形成されると共に、該段差面の円周方向複数箇所から軸方向内方に突出する状態で複数本の係止ピン部が形成されており、
前記第二シールリング及びこの第二シールリングの軸方向内側面側に重ね合わされた円環状の抑え板の互いに整合する部分に形成した通孔に前記各係止ピンを挿通した後、これら各係止ピン部の先端部でこの抑え板の軸方向内側面から突出した部分を加熱して外径が大きくなる方向に溶融変形させる事で、該突出した部分に前記抑え部を形成し、該抑え部により、前記抑え板が前記段差面から離れる方向に変位するのを阻止して、これら抑え板と段差面との間で前記第二シールリングの径方向片半部を挟持する事により、この第二シールリングを前記エンコーダの周縁部に係止する、請求項１に記載したエンコーダ及び組み合わせシールリング付ハブユニットの製造方法。 A part of the periphery of the encoder, together with the stepped surface facing axially inward is formed, engaging pins section several double in a state projecting from the circumferential direction a plurality of locations of the stepped surface axially inwardly Is formed,
After inserting the respective locking pin in said second seal ring and hole formed in a portion aligned with each other in the clamping plates annular superimposed axially inner surface side of the second seal ring, each of these heating the portion protruding from the axially inner surface of the restraining plate at the tip portion of the engaging pin portion by outer diameter Ru melted deformed in the direction of increasing, to form the pressing section to the portion out projecting, by the pressing section, and the pressing plate is prevented from being displaced in a direction away from the stepped surface, by sandwiching the radial piece halves of the second sealing ring between these clamping plates and the stepped surface The manufacturing method of the hub unit with an encoder and combination seal ring according to claim 1 , wherein the second seal ring is locked to a peripheral edge portion of the encoder.
JP2011220868A 2011-10-05 2011-10-05 Manufacturing method of hub unit with encoder and combination seal ring Expired - Fee Related JP5853562B2 (en)

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